Using bleach on polyester?

Question:I want to do a DIY bleach artwork... you spray bleach/water over tape on your shirt and then dunk it in water. Basic question is can i put bleach on a 50% cotton 50% polyester t-shirt or does it have to be all cotton?

Answers:
"Bleach is an effective color remover as long as you confine yourself to natural fibers like cotton, linen, and rayon. If the fabric contains polyester, the color may not discharge, since polyester is usually colorfast. "